*{
    padding: 0;
    margin: 0;
}
ul{
    list-style: none;
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    height: 50px;
    line-height: 50px;
    width: 100%;
    background-color: #eee;
}

ul li{
    flex: 1;
    text-align: center;
    cursor: pointer;
    border: 1px solid #ccc;
}

.active{
    color: red;
}

dl{
    height: 50px;
    border: 1px solid gray;
}

dl dt{
    font-size: 20px;
}
dl dd{
    font-size: 12px;
    color: gray;
}
.box{
    height: calc(100vh - 50px);
    box-sizing: border-box;
    overflow: hidden;
    padding-bottom: 50px;
}

input{
    width: 98%;
    height: 30px;
}